The reason: A group registered students at the high school -- but never turned in their voter registrations to the local clerk's office.

“All we’ve been able to find out is, there was some kind of post-graduation event somewhere and someone was supposedly registering them to vote,” Grand Blanc Township Clerk Cathy Lane said. “Whoever did it never turned the registrations in to us.”

Lane said it has affected "a few" students.

Crutchfield said he was told 30 to 40 recent Grand Blanc grads registered this spring at a post-graduation party and a senior breakfast.

"I had done all the research I knew who I was going to vote for and why. I was really disappointed that I wasn't going to be able to vote," Crutchfield said. “I never expected there to be an issue.”

Grand Blanc High School Assistant Principal Gary Goetzinger said the school allows voter advocacy groups to come in to register students, but he couldn't recall which group came in in the spring.

“I’ve been here 13 years and we’ve done it as a courtesy, so this is the first time in my time here that we’ve ever had a problem,” he said, adding the group will not be invited back if its identity is ever determined.

“(Students) should have gotten a post card or something in the mail indicating they were registered,” he said.

A different group -- Organizing for America -- is registering Grand Blanc students this year, Goetziner said.

Michigan has no law that regulates or requires training for voter advocacy groups, said Fred Woodhams, spokesman for Michigan Secretary of State Ruth Johnson.

“There are certainly a number of groups that have been around for some time and new groups are springing up,” he said. “Normally, it’s a great thing, but you know there is no requirement for these groups to have any training or turn the applications in.”

The deadline to register to vote in Tuesday's election was Oct. 9.

Alyssa Dellorso of Grand Blanc said she signed up at a senior breakfast and discovered she too was never registered.

“I remember when I signed up there was a table on the day of our senior breakfast and there were a couple of people working the table and they gave me a form to fill out and said we will turn that in for you so you are registered to vote,” she said.

Dellorso said she waited in line for 45 minutes at her precinct before discovering she was never registered. A poll worker told her other students had been turned away from her precinct too.

“I’m very frustrated with the fact that I did everything right and I filled out everything way in advance and someone messed this up for me,” Dellorso said. “I’ve been looking forward to vote since I turned 18.”

Voter registration forms require an individual provide sensitive information, such as an address and driver’s license number, that should be kept private, Lane said. Registering at the local clerk’s or Secretary of State offices is a much safer way to become a qualified voter, she said.

“I’m very sorry for the young people missing out on this very unique opportunity and there is nothing we can do,” she said.